Rumi Wakasa's neighbour and a pro-golfer, Teigo Banno, who has just won big, is arguing with his girlfriend. He is moving to the US and wants to start with a 'clean slate'. He offers to break-up with her. His girlfriend and a model, Kurumi Iiyama, threatens him with lawsuit of 1 Million Yen relying on the power of her father, who is a lawyer. He calms her down and invites her to dinner to solve the feud. While she is leaving, he murmurs, "This will be our last supper together". Wakasa overhears their conversation from behind.

Conan is playing 'Ikku' in the school play, which happens the day after. Kobayashi-sensei, Rumi-sensei as well as Conan's classmates are astonished at his wonderful acting and delivery of his lines. It seems that Conan had played 'Ikku-san' as Shinichi before and his parents had trained him well. This is why, he missed several rehearsals as Conan as he remembered most of his lines.

During the clean-up and preparation for the play, Wakasa accidentally spills dirty water over her painting of the tiger. She says that she'd repaint it without any problem but the reference photo she used is in her apartment and she'd need Conan for correctly matching the size of the painting. Conan and the Detective Boys agree to accompany her to her apartment. During their arrival, they see a lady wearing a hat and sunglasses knocking at the door of Wakasa's neighbor. When her neighbour doesn't respond, she bangs on the door in rage, clicks her tongue and leaves. After the Detective Boys and Wakasa are done painting and having a meal served by Wakasa to show her appreciation, loud music starts playing at her neighbour's room. When the music doesn't seem to stop, Genta goes to complain and, to his astonishment, finds two people lying on the floor with a pool of blood below the lady's head. Conan, Wakasa and the others arrive.

Murder

Location:

Teigo Banno's apartment

Victim:

Kurumi Iiyama

Age:

29 years old

Cause of death:

Blunt force trauma

Suspects:

Mysterious woman

The neighbour, Teigo Banno, gets up and is frightened. The bludgeoned victim was apparently his girlfriend, Kurumi. Megure arrives with his team and starts investigating. Teigo says that a lady with sunglasses and a hat came and made him unconscious with a stun gun. When his girlfriend came at the same time, she was killed. The culprit wrote 'I love you' on his face. The two polaroid photos lying next to him prove it. The Detective Boys try to convict the boyfriend for the murder but the evidence seems to be on his side. Wakasa finally mentions Teigo's encounter with his girlfriend in the morning.

Genta's hand smells of ladies foundation. Conan deduces it has to do something with the case. Haibara tries to write on her face using her phone as a mirror, but fails miserably. She is also unable to erase the funny rings she accidentally drew on her face having used a permanent marker. Genta is asleep on the painting. He wakes up with a tiger mark on his face. Conan finds a convenience store receipt dated that morning under his sitting mat. Incidentally, Wakasa went to the convenience store in the morning because all the good food stuff runs out after school. As a result, she was late for school, which is a very rare case.

Teigo didn't touch his face when Haibara told him that something was written on it so that he could preserve the crafted evidence.

The suspicious woman in question is of the same height as Teigo.

Teigo recognized that the writing was not of his girlfriend in a mirrored phone screen without having seen Kurumi's handwriting.

No handwriting matches were found amongst his fan letters.

The foundation smell on Genta's hand came from when he knocked on the same spot on the door where the suspicious woman did. Teigo disguised his dark skin using foundation even on his hands, which actual women don't.

Teigo Banno disguised as the suspicious woman and killed his girlfriend. He used a plastic wrap to transfer the writing to his face. He exchanged the sleeves and applied foundation on Kurumi's hand to disguise it as his in the photo.

When he tries to escape, Wakasa-sensei stops him and get her picture and name in the news. In the police department, Hyoue Kuroda reads the article about Rumi and comments it was well done. Meanwhile, the sushi chief Kanenori Wakita is seen reading an article commenting "this one is quick witted".

Wakasa seems to have known a murder was going to occur from the conversation between the victim and the culprit, yet she didn't try to prevent it. Her motive remains unknown. Then, between Kuroda and Wakita, she can be the most suspicious as Rum, because that's clearly a crime and the other two have never done such a thing.